the.com/insulator
The professional bouncer of physics, blocking electrons that didn't make the list.
glass twistGlass insulates until heated, then conducts electricity
diamond kingDiamond insulates electricity but conducts heat brilliantly
collector crazeAntique glass power-line insulators sell for thousands
superconductor flipSome insulators become superconductors near absolute zero
life saverRubber gloves keep electricians breathing around live wires